Bowers & Wilkins CT700 SERIES CT7.5 LCRS: Limited Warranty

7105 CT7X IM Inner Iss3.qxd 11/9/08 9:23 am Page 3

Stray Magnetic Fields

can be reduced by placing irregular shaped items or

non-reflective surfaces, bookshelves, rugs or pictures

The speaker drive units create stray magnetic fields

for example, on one of the offending walls or floor.

that extend beyond the boundaries of the cabinet. We

recommend you keep magnetically sensitive articles

Running-in Period

(CRT television and computer screens, computer

The performance of the speaker will change subtly

discs, audio and video tapes, swipe cards and the

during the initial listening period. If the speaker has

like) at least 0.5m (20 in) from the speaker. LCD and

been stored in a cold environment, the damping

plasma screens are not affected by magnetic fields.

compounds and suspension materials of the drive

Connections

units will take some time to recover their correct

mechanical properties. The drive unit suspensions will

All connections should be made with the equipment

also loosen up during the first hours of use. The time

switched off.

taken for the speaker to achieve its intended

CT700 Series speakers have a pair binding post

performance will vary depending on previous storage

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connection terminals and one Neutrik

Speakon

conditions and how it is used. As a guide, allow up to

connection socket on their rear panels. The binding

a week for the temperature effects to stabilise and

post terminals provide quick and easy connection of

15 hours of average use for the mechanical parts to

stripped wires while the Speakon socket provides a

attain their intended design characteristics.

more secure and reliable connection method.

However, longer run-in periods (as long as a month)

If the binding post terminals are to be used, connect

have been reported and there is evidence to suggest

the positive cable to the red terminal and the negative

that this has little to do with the speaker changing and

cable to the black terminal. Incorrect connection can

more to do with the listener getting used to the new

result in poor imaging and loss of bass. Figure 5a

sound. This is especially so with highly revealing

illustrates use of the binding post terminals

speakers such as these where there may be a

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If the Speakon

option is to be used, disassemble the

significant increase in the amount of detail compared

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Speakon

plug as shown in Figure 5b, connect the

with what the listener has previously been used to; the

positive cable to the terminal marked +1 and the

sound may at first appear too “up front” and perhaps

negative cable to the terminal marked -1. Incorrect

a little hard. After an extended period of time the

connection can result in poor imaging and loss of

sound will seem to mellow, but without losing clarity

bass. Once the plug is reassembled it can be inserted

and detail.

into the socket and locked by twisting clockwise.

Aftercare

Ask your dealer for advice when selecting speaker

The cabinet surfaces usually only require dusting. If you

cable. Keep its total impedance below the maximum

wish to use an aerosol or other cleaner, remove the

recommended in the speaker specification and use a

grille first by gently pulling it away from the cabinet.

low inductance cable to avoid attenuation of high

Spray aerosols onto the cleaning cloth, not directly

frequencies.

onto the product. Test a small area first, as some

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Neutrik

and the names of Neutrik

products

cleaning products may damage some of the surfaces.

referenced herein are either trademarks and/or service

Avoid products that are abrasive, or contain acid, alkali

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marks of Neutrik

.

or anti-bacterial agents. Do not use cleaning agents on

the drive units. The grille fabric may be cleaned with a

Fine Tuning

normal clothes brush whilst the grille is detached from

Before fine tuning, make sure that all the connections

the cabinet. Avoid touching the drive units, especially

in the installation are correct and secure.

the tweeter, as damage may result.

If the bass seems uneven with frequency this will most

probably be due to resonance modes in the listening

room. Even small changes in the listening position can

Limited Warranty

have a profound effect on how these resonances

affect the sound. Try moving the listening position. The

This product has been designed and manufactured to

presence and position of large pieces of furniture can

the highest quality standards. However, if something

also influence resonance modes. If you want generally

does go wrong with this product, B&W Group Ltd. and

to reduce the volume of bass fit the foam plugs in the

its national distributors warrant free of charge labour

speakers’ port tubes as illustrated in Figure 6.

(exclusion may apply) and replacement parts in any

If the sound is too bright, increasing the amount of

country served by an official B&W distributor.

soft furnishing in the room (heavier curtains for

This limited warranty is valid for a period of five years

example) may help balance the sound. Conversely,

from the date of purchase or two years for electronics

reducing the amount of soft furnishing may help

including amplified loudspeakers.

brighten a dull sound.

Terms and Conditions

Some rooms suffer from “flutter echoes” – echoes that

1 The warranty is limited to the repair of the

“bounce” between parallel room boundaries. Flutter

equipment. Neither transportation, nor any other

echoes can colour the sound of the speakers in the

costs, nor any risk for removal, transportation and

room. Test for flutter echoes by standing in the middle

installation of products is covered by this warranty.

of the room and clapping your hands. Flutter echoes

3